Most of the people you are talking about are around 10 years old and they just don't care about competition, they want to have fun. The reason is maybe that when they play with someone more experienced or skilled, they are called automatically 'noob' (because of their low skill) and they lose their motivation to play ctf/battle because they lose fast in this gametypes. Other problem is that it's hard to talk with these people as their lack the knowledge of english. Also I rarely see skilled players playing in public servers. So with whom the new players can play 'better' gametypes?
The group of experienced jj2 players is really exclusive. They (we?) aren’t interested in teaching new players how to play, what are the useful programs or what’s going on in the community (as tournaments etc.). If someone do this job, there will be more real players in this community.

The main reason why most people play only hotels or tests – because they can feel that they are good in them ;P And hotel/test is the easiest gametype. You don’t have to know ctf codes or have many progs (like seekerhole fix etc.) to play them.